Ellensburg in September
8.7out of 10
Yes, a good time to go
Warm and comfortable: highs around 23°C. Very dry: about 3 rainy days.
23°CAvg high
9°CAvg low
3Rainy days (15 mm)
12:19 hDaylight
06:47Sunrise · 19:06 Sunset
Why this score
- Warm and comfortable: highs around 23°C
- Very dry: about 3 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
How reliable is the forecast?
Rain in September varies a lot between years (±3.1 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 1°C | -4°C | 69 mm | 12 | – | – | 3.7 |
| February | 4°C | -3°C | 50 mm | 9 | – | – | 4.7 |
| March | 9°C | -1°C | 46 mm | 10 | – | – | 5.5 |
| April | 14°C | 2°C | 33 mm | 8 | – | – | 6.7 |
| May | 20°C | 6°C | 32 mm | 8 | – | – | 7.7 |
| June | 23°C | 9°C | 18 mm | 5 | – | – | 8.4 |
| July | 29°C | 13°C | 7 mm | 2 | – | – | 8.8 |
| August | 28°C | 12°C | 7 mm | 2 | – | – | 8.9 |
| September | 23°C | 9°C | 15 mm | 3 | – | – | 8.7 |
| October | 14°C | 4°C | 42 mm | 7 | – | – | 6.9 |
| November | 6°C | -1°C | 65 mm | 11 | – | – | 4.7 |
| December | 1°C | -5°C | 77 mm | 13 | – | – | 3.6 |
Frequently asked questions
How hot is Ellensburg in September?
Daytime highs average 23°C and nights about 9°C.
When is the best time to visit Ellensburg?
The best months are August, July, September, June.